LOINCActiveBoth

LOINC Code 31988-9: WEEV Ag Ql (Specimen)

31988-9 is a LOINC code used to identify WEEV Ag Ql (Specimen) in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Western equine encephalitis virus Ag. It is commonly used with the system or sample type XXX.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Western equine encephalitis virus Ag. It is commonly used with the system or sample type XXX.

When is it used?

  • Used in lab systems, EHRs, and clinical data exchange.
  • May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
  • Status: ACTIVE
  • Order vs observation: Both

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • Western equine encephalitis virus Ag [Presence] in Specimen
  • Western equine encephalitis virus Ag
  • Antigen; Antigens; Enc; Enceph; Encephalomyelitis; Equin; ID; Infectious Disease; InfectiousDisease; Microbiology; Misc; Miscellaneous; Ordinal; Other; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Spec; To be specified in another part of the message; Togavirus; Unspecified; WEE virus; WEEV; West

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

WEEV Ag Ql (Specimen)Western equine encephalitis virus Ag [Presence] in SpecimenWEEV Ag Spec QlWestern equine encephalitis virus AgMICROWEEV antigen, SpecimenPrThr

Frequently asked questions

Code details

Code31988-9
SystemLOINC
Display nameWEEV Ag Ql (Specimen)
DescriptionWestern equine encephalitis virus Ag
Short nameWEEV Ag Spec Ql
ComponentWestern equine encephalitis virus Ag
PropertyPrThr
TimingPt
System (specimen)XXX
ScaleOrd
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.07
Last changed2.69

Consumer names

WEEV antigen, Specimen

Part names

Western equine encephalitis virus AgPrThrPtXXXOrdPresence or ThresholdPoint in time (spot)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

LOINC Code 31988-9 | HealthAssure